They dont need mo cap to make him bigger/taller. And they dont need to make him as bulky as he is in most of the comics. In fact, it would be cool if he had more or less standard human proportions but was 7 to 8 feet tall. The concept art plus the prosthetics should work. But they need to hire a legit actor.

That would be kind of lame. I like his bulky size from the comics. Giving him a human like physique wouldn't make him look all that imposing.